fix: use compose rm -sf (not down) to stop only staging, not prod

down tears down the entire compose project including prod.
rm -sf stops and removes just the named service.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/workflows/deploy.yml

@@ -260,7 +260,7 @@ jobs:
 
       - name: Stop old containers
         run: |
-          docker compose --profile staging-go down 2>/dev/null || true
+          docker compose --profile staging-go rm -sf staging-go 2>/dev/null || true
           # Kill legacy container names from pre-rename era
           docker rm -f meshcore-staging meshcore-staging-go corescope-staging 2>/dev/null || true
           sleep 2